20 W Modular Power AmplifierThe model WLL3535 20 W modular power amplifier is designed for 3.4 to 3.6 GHz wireless local loop (WLL) applications. The unit provides 43 dB of gain and meets the ETSI standard emission mask at rated output. The three-module, fault-tolerant, hot-swap design minimizes system downtime and permits module replacement without service interruption. The unit is packaged for 19" rack-mount installation and operates on a -48 V DC power source.AML Communications Inc., Camarillo, CA (805) 388-1345.

TWT Microwave AmplifierThe model 15T4G18 traveling-wave tube (TWT) microwave amplifier tests to the higher frequency radiated RF requirements of the new Bellcore telecommunications specification. The unit features a frequency response from 4.2 to 18 GHz and offers 15 W (min) output standard, 10 W (min) in a choice of three low harmonic sub-bands. A digital front panel displays extensive system status information that can be accessed through a series of menus using soft keys or remotely via the built-in IEEE-488 interface.Amplifier Research (AR), Souderton, PA (215) 723-8181.

Thin-film Cascadable AmplifierThe MTS 2510 series 10 to 2500 MHz thin-film GaAs FET amplifier is designed for use in high output power and low noise applications. The unit features +5 to +12 V supply voltage at 190 mA (typ), +20 to +28 dBm (typ) output power and low noise of 4 dB (typ). The supply voltage is coupled through a choke directly to the FET, providing relatively constant gain and noise figure, but with an output power that varies with voltage. The amplifier is available in TO-8, surface-mount or connectorized packages. Avnet Microwave Technical Solutions, San Jose, CA (408) 360-4076.

Tower AmplifierThe model 810 tower amplifier is a small, rugged unit designed for use as a low noise pre-amplifier to be placed in line next to the tower-top antenna subsystem. The unit's package is lightweight and supported easily when inserted in the existing signal cable. No additional cables, antenna or wiring are needed.Cellular Specialties Inc. (CSI), Manchester, NH (603) 626-6677.

Tower-mounted AmplifierThe model 490105 trunking/SMR tower-mount amplifier provides significant uplink range extension for rural sites and features a compact, weatherproof enclosure that houses an LNA with preselector and impulse suppressor. The unit includes a current meter that monitors LNA performance, and operates from 12 to 20 V DC, negative ground. In addition, portable talk-back range is improved by the unit's low system noise figure (1.8 dB (typ)) and additional extension can be realized if the company's Maximizer antennas are used at sectorized sites. The amplifier uses dual GaAs FET devices in hybrid configuration for high reliability.Celwave, a division of Radio Frequency Systems Inc., Marlboro, NJ (800) 235-9283.